There may be two possibilities for this unit:

1. The discs are of low quality/bootlegs/defective.
**Especially if there are certain discs and/or tracks that perform better than others.
**Note: There are many very good copycat bootlegs that look just like the original.

2. The player is defective.
**If the unit is defective it will most likely have problems reading regular commercial DVD movies.
**It will not depend on what track it is.

TO DETERMINE/TROUBLESHOOT:
-Insert a regular commercial DVD movie and watch it completely.
--If it freezes, it is most likely a defective player.
--Otherwise, the Super CD+G discs are defective.

-Insert the CAVS 200 Song Sampler Disc if it came with the player.
--If it works perfectly, it's most likely the other super CD+G discs.
--Otherwise, the unit is defective

If discs seem to be the problem, contact your dealer.
If player is the problem please request an RMA Number to return the product for repair.
http://cavsusa.com/service/rma.htm